weird lines

I am writing from my Lenovo Legion Y-520 laptop. Once the OS loads to login screen weird lines start from bottom of the screen and up. What's strange here is that when i login despite all distortions and enter sleep mode, on wake up they're gone. What could be the cause for that kind of...

so basically since 2 days ago i went back to a restore point beacuse of various reasons, however ever since that restore point my screen has been acting up so strangely, it works perfectly fine on my nintendo switch so it has to do with computer but i cant find any solutions, basically im...